//判断菜单节点是否是末级节点
export default function leafUtils(){ 
  const setLeaf =(arr) => { 
    if(arr && arr.length >0){ 
      for(let i =0; i < arr.length;i++){ 
        if(arr[i].children && arr[i].children.length > 0){ 
          arr[i].open = false; 
          setLeaf(arr[i].children) 
          }else{ 
            arr[i].open = true; 
        } 
      } 
    } 
    return arr  
  }
  return{ 
    setLeaf  
  }
}